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INDONESIA
ASEAN Journal on Science and Technology for Development
Published by Universitas Gadjah Mada
ISSN : 22249028     EISSN : 22249028     DOI : -
Core Subject : Science, Education, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Mathematics
The coverage is focused on, but not limited to, the main areas of activity of ASEAN COST, namely: Biotechnology, Non-Conventional Energy Research, Materials Science and Technology, Marine Sciences, Meteorology and Geophysics, Food Science and Technology, Microelectronics and Information Technology, Space Applications, and Science and Technology Policy, Infrastructure and Resources Development.
Arjuna Subject : -
Articles 6 Documents
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Search results for , issue "Vol. 36 No. 3 (2019): Ahead of the Storm" : 6 Documents clear
Recovery and Purification of Glycerine as By-product from Philippine Coconut Methyl Ester Annabelle V. Briones
ASEAN Journal on Science and Technology for Development Vol. 36 No. 3 (2019): Ahead of the Storm
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.559

Abstract

The study is about the recovery and purification of glycerine as a by-product from coconut methyl ester production in the Philippines. The aqueous layer produced from settling or phase splitting of the methyl ester after the transesterification process was subjected to various treatments like acidification, neutralization, concentration in vacuo in order to get back the crude glycerine. The crude glycerine obtained from the laboratory and scale-up process conformed with the specification set by the British standard for crude glycerine. The recovered glycerine is composed of: 84.92%, glycerine; 8.03%, ash; 4.72%, H20; 2.32%, MONG. Further distillation yielded a refined glycerine that meets with the specification set by USP. The average glycerine content of refined glycerine is 96.86%; ash, 0.06%; water, 1.10%, refractive index @ 20°C, 1.4696, specific gravity at 25°C, 1.296 g.
SINGV – the Convective-Scale Numerical Weather Prediction System for Singapore Xiang-Yu Huang; Dale Barker; Stuart Webster; Anurag Dipankar; Adrian Lock; Marion Mittermaier; Xiangming Sun; Rachel North; Rob Darvell; Douglas Boyd; Jeff Lo; Jianyu Liu; Bruce Macpherson; Peter Heng; Adam Maycock; Laura Pitcher; Robert Tubbs; Martin McMillan; Sijin Zhang; Susanna Hagelin; Aurore Porson; Guiting Song; Becky Beckett; Wee Kiong Cheong; Allison Semple; Chris Gordon
ASEAN Journal on Science and Technology for Development Vol. 36 No. 3 (2019): Ahead of the Storm
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.581

Abstract

Extreme rainfall is one of the primary meteorological hazards in Singapore, as well as elsewhere in the deep tropics, and it can lead to significant local flooding. Since 2013, the Meteorological Service Singapore (MSS) and the United Kingdom Met Office (UKMO) have been collaborating to develop a convective-scale Numerical Weather Prediction (NWP) system, called SINGV. Its primary aim is to provide improved weather forecasts for Singapore and the surrounding region, with a focus on improved short-range prediction of localized heavy rainfall. This paper provides an overview of the SINGV development, the latest NWP capabilities at MSS and some key results of evaluation. The paper describes science advances relevant to the development of any km-scale NWP suitable for the deep tropics and provides some insights into the impact of local data assimilation and utility of ensemble predictions.
Temporary Shelter Simulation Towards Effectiveness Value of OTTV and Thermal Comfort Dyah Puspa Ayu; Budi Prayitno; Agus Hariyadi
ASEAN Journal on Science and Technology for Development Vol. 36 No. 3 (2019): Ahead of the Storm
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.582

Abstract

Indonesia is prone to a variety of natural disasters, one of which is earthquakes. Earthquakes are detrimental to human life, causing among other things a loss of shelter. As such, victims of earthquakes need basic assistance in the form of shelter, which the Indonesian government provides in the transition phase of emergency responses. Several innovations in the provision of temporary shelter have arisen in terms of packaging and fast unloading. This research aimed to examine the effective value of OTTV energy (overall thermal transfer value), differences in room temperature, and thermal comfort in existing temporary shelters. OTTV values and thermal comfort are adapted to Indonesia's humid tropical climate, which has a temperature ranging 24–30°C and air humidity of 75%. Temporary shelters were simulated with Rhinoceros and Grasshopper softwares. The simulation was carried out in two stages, with the first stage simulating the temporary shelter materials and the second stage simulating according to a predetermined standard. The results concluded that the effective value of OTTV with the use of Styrofoam-based shelter gives a value of 27.63 W/m2 with a decrease of up to 4.70 W/m2 and the temperature drops to 2–3°C.
GIS Developments for Ecosystem-based Marine Spatial Planning and the Challenges Faced in Indonesia Karlina Triana; A'an Johan Wahyudi
ASEAN Journal on Science and Technology for Development Vol. 36 No. 3 (2019): Ahead of the Storm
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.587

Abstract

Aiming to lessen degradations and effects on marine ecosystems, Marine Spatial Planning is used as a management method with a purpose to help lead the development and used in the marine environment. The stages of the planning are collection, management, and analysis of spatial data, and also decision support systems. This method requires tools to be able to achieve the goals effectively. Geographic Information System (GIS) and remote sensing can efficiently and effectively be used to access and summarize spatial data into information forms to evaluate the Marine Spatial Planning projects. GIS and remote sensing obviously have an essential function in terms of its opportunities and its capabilities for development and projections in the future. This review is intended to produce critical description on the study of GIS development for Marine Spatial Planning. Furthermore, this review is intended to foresee the challenges faced in its implementation in Indonesia.
Analyzing the Characteristics of Domestic Wastes in Belik River, the Special Region of Yogyakarta, Indonesia Slamet Suprayogi; Muh Aris Marfai; Ahmad Cahyadi; Reviana Latifah; Hendy Fatchurohman
ASEAN Journal on Science and Technology for Development Vol. 36 No. 3 (2019): Ahead of the Storm
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.591

Abstract

The multiplying number of population in the City of Yogyakarta has resulted in a larger volume of wastes in the region. People living on the riverbanks are unfortunately in the habit of discarding domestic waste directly to the river channel, worsening the already polluted water. This study was intended to analyze the characteristics of the municipal wastewater contaminating Belik River. During the water quality test, a rapid investigation method and laboratory analysis were employed. The sampling in the field was based on river segments and travel time of river water. Based on the laboratory test results, the concentrations of phosphate, BOD, and COD in the water bodies had exceeded the standard for Class II water quality indicating pollution due to frequent disposal of household wastes like detergents. The higher the BOD and COD levels, the more unsuitable the water for fisheries and agricultural practices.
Fenton Oxidation using Easily Recoverable Catalyst of Magnetite (Fe3O4) as an Efficient Approach to Treatment of Rhodamine B Dyeing Effluent in Traditional Fabrics Industry Imam Prasetyo; Febry Akbar; Anindya Widi Prabandari; Teguh Ariyanto
ASEAN Journal on Science and Technology for Development Vol. 36 No. 3 (2019): Ahead of the Storm
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.592

Abstract

A direct release of dye wastewater to a water environment without pre-treatment could cause negative impacts. To solve them, an effective method for degrading wastewater contaminants is needed. In this research, the Fenton reaction using Fe3O4 catalyst for removal of wastewater contaminants taken from a traditional fabrics industry was studied. For this purpose, reaction temperature was varied in the range of 27–90°C. Furthermore, catalyst concentration was also varied in the range of 2–6 g/L solution. The results showed that increasing both temperature and catalyst concentration will increase the performance of the Fenton reaction in degrading wastewater contaminants. The contaminant degradation was measured by detecting chemical oxygen demand and inspecting the color of wastewater. The highest reduction of color intensity was 98.96% at 90°C temperature and 2 g Fe3O4/L solution.

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